ABB UNS0868A-P Modules: HIEE305120R0002 UNS0868A-P V2

Technical Dossier

Product Details And Specifications

ABB UNS0868A-P Series: Comprehensive Module Range and Technical Overview

The ABB UNS0868A-P series comprises dedicated power supply modules engineered for deployment within ABB's Advant OCS and AC800M distributed control system (DCS) platforms. These units are installed across critical heavy-industry infrastructure globally, including petrochemical refineries, nuclear power generation facilities, offshore oil and gas platforms, pulp and paper mills, and large-scale chemical processing plants. The UNS0868A-P family provides regulated DC power to controller backplanes and I/O sub-systems, ensuring continuous, stable operation under demanding industrial electrical environments. Their design conforms to IEC 61131-2 and relevant ABB internal hardware standards, making them a long-term fixture in plant asset inventories worldwide.

The Evolution of UNS0868A-P Architecture

The UNS0868A-P power supply lineage originates from ABB's Advant Controller 400 series ecosystem, developed through the 1990s as ABB consolidated its industrial automation portfolio following the merger of ASEA and Brown Boveri. Early revisions of the UNS0868A-P were designed to interface directly with the Advant OCS S100 and S400 I/O backplane bus architectures, providing isolated 24 VDC and 5 VDC rails to co-located processor and I/O modules.

With the transition to the AC800M platform in the early 2000s, ABB introduced revised hardware versions (V2 and later) of the UNS0868A-P to address updated backplane connector specifications, improved EMC shielding, and enhanced thermal management. The HIEE305120R0002 order code designates the second major hardware revision (V2) of the UNS0868A-P, incorporating revised internal switching topology and updated capacitor specifications for extended service life in high-ambient-temperature installations.

As the Advant OCS platform entered its end-of-active-production phase, ABB transitioned customers toward the System 800xA architecture. However, the installed base of Advant and AC800M systems remains extensive, and UNS0868A-P modules continue to be required for ongoing maintenance, emergency replacement, and lifecycle extension programs at facilities that have not yet completed migration projects.

UNS0868A-P Full Catalog & Functionalities (SKU List)

The following SKUs represent the documented UNS0868A-P series and closely associated power supply and system modules within the ABB Advant OCS / AC800M ecosystem. Each entry reflects a distinct hardware configuration or revision level.

HIEE305120R0002 / UNS0868A-P V2: Primary 24 VDC regulated power supply, hardware revision V2, for Advant OCS S400 backplane.

HIEE305120R0001 / UNS0868A-P V1: First-generation hardware revision; original production release for S400 I/O stations.

HIEE305120R0003 / UNS0868A-P V3: Third hardware revision with updated EMC filtering and extended temperature rating.

HIEE300024R0001 / UNS0880A: Redundant power supply module for AC800M controller cabinet, dual-feed configuration.

HIEE300024R0002 / UNS0880A V2: Revised redundant PSU with improved hold-up time specification for AC800M.

HIEE305121R0001 / UNS0869A-P: Companion 5 VDC logic power supply for Advant OCS S400 I/O backplane co-installation.

HIEE305121R0002 / UNS0869A-P V2: Hardware V2 of the 5 VDC logic rail supply; updated switching frequency.

HIEE300748R0001 / UNS0882A: AC800M power distribution module; distributes regulated DC to multiple I/O clusters.

HIEE300748R0002 / UNS0882A V2: Revised distribution module with enhanced short-circuit protection per IEC 60947-4.

HIEE300025R0001 / UNS0881A: Battery backup interface module for AC800M; supports UPS bridging during mains interruption.

HIEE300025R0002 / UNS0881A V2: Updated battery interface with improved charge management and status diagnostics.

HIEE300749R0001 / UNS0883A: Field power supply module for S800 I/O stations; 24 VDC field bus power.

HIEE300749R0002 / UNS0883A V2: Revised field PSU with integrated surge suppression for field wiring terminals.

HIEE300026R0001 / UNS0884A: Isolated 24 VDC supply for PROFIBUS DP segment power within AC800M architecture.

HIEE300026R0002 / UNS0884A V2: Updated PROFIBUS segment supply with galvanic isolation improvement to 500 V RMS.

HIEE300027R0001 / UNS0885A: Auxiliary 48 VDC power module for legacy Advant OCS S100 I/O backplane compatibility.

HIEE300027R0002 / UNS0885A V2: Revised 48 VDC auxiliary supply with updated inrush current limiting circuit.

Sourcing Hard-to-Find & Obsolete UNS0868A-P Parts

The UNS0868A-P series, particularly V1 and V2 hardware revisions, is no longer in active production by ABB. Standard OEM supply channels have closed or carry extended lead times measured in months. DriveKNMS maintains a dedicated inventory of tested, pull-out, and refurbished UNS0868A-P units sourced from decommissioned plant equipment, controlled surplus, and verified distributor stock globally.

DriveKNMS provides lifecycle extension support for facilities operating Advant OCS and AC800M systems beyond their original design horizon. This includes cross-referencing obsolete order codes to current or equivalent hardware, providing functional test certificates for each shipped unit, and supporting emergency same-day dispatch for critical plant breakdown scenarios. Customers operating under long-term maintenance contracts or turnaround schedules are encouraged to establish consignment stock arrangements to eliminate lead-time risk for UNS0868A-P and associated power supply modules.

Quality Control for the UNS0868A-P Range

Each UNS0868A-P unit processed by DriveKNMS undergoes a structured inspection and functional verification protocol specific to ABB Advant OCS power supply modules. The procedure includes: visual inspection of PCB, capacitor condition, and backplane connector integrity; powered bench test under rated load conditions (output voltage regulation, ripple measurement, and overcurrent trip verification); thermal imaging under sustained load to identify degraded components; and backplane bus communication verification using ABB-compatible test fixtures where applicable.

Units that do not meet original ABB output specification tolerances are rejected from inventory. All accepted units are issued a DriveKNMS test record with date, technician ID, and measured parameters. Packaging conforms to IEC 61340-5-1 ESD protection requirements for sensitive electronic assemblies.